Simpson Deck-Drive DSV Wood Screw - #8 x 1-5/8" in Red with T25 6-Lobe Drive is a purpose-built fastener from Simpson designed for preservative-treated decking, fencing, furniture, and wood-to-wood construction. With its Quik Guard Coating, variable thread design, and rimmed flat head with nibs, this deck screw delivers a clean countersunk finish while standing up to the swelling and shrinkage common in fast-growth lumber. Whether you're building a guard rail infill, completing a DIY home project, or fastening fascia and trim, the DSV is engineered to seat quickly and hold securely in exterior wood applications.

Key Features

• Quik Guard Coating in Red - provides corrosion resistance suited for exterior and preservative-treated wood applications, while the red color helps the screw blend cleanly with certain deck board finishes for a polished appearance.
• Rimmed Flat Head with Under-Head Nibs - the nibs cut into the wood surface as the screw seats, allowing it to countersink flush without pre-drilling, resulting in a smooth, finished deck surface.
• Variable Thread Design - engineered to accommodate the expansion and contraction natural to fast-growth lumber and preservative-treated wood, helping maintain a tight, lasting connection over time.
• High-Low Threaded Point - the alternating high-low thread geometry provides fast starts and reduces driving resistance, making installation faster and easier, especially on a full deck project.
• T25 6-Lobe Drive - the Torx-style recess delivers excellent bit engagement and reduced cam-out compared to Phillips or square drives, keeping installation efficient and protecting the screw head from damage.
• #8 x 1-5/8" Size - a compact, versatile length ideal for fastening deck boards, fencing, and trim where a slender-profile screw is needed to avoid splitting thinner boards.
• Compatible with Simpson Quik Drive Auto-Feed System - available in collated strips for use in the Quik Drive system, which dramatically speeds up large decking installations by eliminating the need to handle individual fasteners.

Why This Product

• Designed specifically for preservative-treated decking - the Quik Guard Coating is formulated to resist corrosion in the demanding chemical environment of treated lumber, making this screw a reliable choice where standard fasteners would degrade prematurely.
• Countersinks cleanly without extra steps - the under-head nibs and fast-start threaded point work together so the screw seats flush in one motion, reducing prep time and leaving a professional-looking deck surface without plugging or sanding.
• Built for wood movement - the variable thread shank is specifically shaped to handle the swelling and shrinkage inherent in fast-growth lumber and outdoor wood decking, helping prevent board cracking or screw loosening over seasons of use.
• Flexible installation method - compatible with both hand-drive use and collated Quik Drive auto-feed systems, this screw adapts to small DIY jobs and large professional deck builds alike without requiring different fasteners for different workflows.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length: 1-5/8 in.
• Head Diameter: 0.330 in.
• Head Type: Rimmed Flat Head with Nibs
• Drive Type: T25 6-Lobe
• Thread Type: Variable Thread Design
• Point Type: High-Low Threaded Point
• Coating/Finish: Quik Guard Coating
• Color: Red
• Approx. Count Per Lb: 159

Available Pack Options

• DSVR158R1LB: 1 Lb - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR158R350: 350 Pk - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR158R5LB: 5 Lb - includes (1) T25 6-lobe driver bit (replacement driver bit - BIT25T-2-R2)
• DSVR158MB: 1750 Pk - includes (2) T25 6-lobe driver bits (replacement driver bit - BIT25T-2-R2)

Approved Applications

• Fastening Wood-to-Wood
• Decks - Guard Rail Infill
• DIY/Home Projects
• Fencing
• Furniture

Frequently Asked Questions

What type of wood applications is the Quik Guard Coating rated for?

The Quik Guard Coating is designed to provide corrosion resistance for exterior applications and certain preservative-treated wood applications. It is well-suited for outdoor decking environments where treated lumber is commonly used.

Why does this screw have a variable thread design?

The variable thread design is specifically engineered to handle the natural swelling and shrinkage that occurs with fast-growth lumber and treated deck boards. This helps the screw maintain a secure hold even as the wood expands and contracts through seasonal changes.

Can these screws be used with an auto-feed screw driving system?

Yes. The Deck-Drive DSV is available in collated strips for use with the Simpson Strong-Tie Quik Drive auto-feed screw driving system, making it suitable for high-volume decking installations in addition to standard hand-drive use.

Do I need to pre-drill when using these deck screws?

Pre-drilling is typically not required. The rimmed flat head with under-head nibs is designed to countersink the screw flush into the deck board surface in a single step, while the high-low threaded point enables fast starts without a pilot hole in most standard wood decking applications.